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5-4
BRAKES-SERVICE
62
x
50lC
Fig. I-Front
Brake Assembly
(3) Be
sure
the parking brake lever is fully
re-
leased, then back off the parking brake cable adjust-
ment
so
there is slack in the cable.
(4)
Insert the adjusting tool
C-3784,
into the star
wheel of the adjusting screw. Move the handle of the
tool downward until a slight drag is felt when the road
wheel is rotated.
(5)
Insert a thinscrew driver into the brake adjust-
ing hole and push the adjusting lever out of engage-
ment with the star wheel (Fig. 3). Care should be tak-
en not to bend the adjusting lever, while holding the
adjusting lever out of engagement, back off the star
wheel 10 to
12
notches to insure a free wheel with no
brake shoe drag.
(6) Repeat the above adjustment at each wheel. The
adjustment
must
be equal at all wheels. Install the
adjusting hole covers in the brake supports.
(7)
Tighten the parking brake cable adjusting nut
until a slight drag is felt at the rear wheels, loosen
the cable adjusting nut until both rear wheels can be
rotated freely, then back off the cable adjusting nut
two full turns.
Testing Automutic Adjuster Operation
Place the vehicle on a hoist, with a helper in the
driver's seat to apply the brakes. Remove the plug
from the rear adjustment slot in each brake support
plate to observe the adjuster star wheel. Then, to ex-
clude the possibility of maximum adjustment; that is,
the adjuster refuses to operate because the closest
possible adjustment has been reached; the star wheel
should be backed off approximately
30
notches. It will
be necessary to hold the adjuster lever away from
the star wheel to allow backing off of the adjustment.
Spin the wheel and brake drum in the reverse di-
rection and apply the brakes vigorously. This will pro-
vide the necessary inertia to cause the secondary
brake shoe to leave the anchor. The wrap up effect
will move the secondary shoe, and the cable will pull
the adjuster lever up. Upon release of the brake
pedal, the lever should snap downward, turning the
star wheel. Thus, a definite rotation of the adjuster
star wheel can be observed if the automatic adjuster
is working properly. If by the described procedure
one or more automatic adjusters do not function prop-
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